Brake head balancing device



July 31,1945. c. E. TACK 2,380,803

BRAKE HEAD BALANCING DEVICE Original F iled Dec. 3, 1941 III- F}; r MI i i A 7 iii 1% 40 LI VI m I f 16 6 Z 1 VENTOR.

Patented July 31, 1945 UNITED STATES PATENT OFFICE 2,380,803 BRAKE HEAD BALANCING DEVICE Carl E. Tack, Chicago, Ill., assignor to American Steel Foundries, Chicago, Ill., a corporation of New Jersey Original application December 3, 1941, Serial No. 421.418, now Patent No. 2,355,120, dated August 8. 1944. Divided and this application June 25, 1942, Serial No. 448,373

Claims. (Cl. 188-212) My invention relates to railway brake equiplever in order to facilitate assembly of the lever ment and more particularly to mechanism for. and the shoe as above described. frictionally resisting the pivoting of a brake head In the drawing, Figure 1 is a Slide elevation at its point of connection to an associated brake of a brake head and brake lever embodyin y lever, such mechanism being commonly known 6* inv tio nd Figure 2 is a top P n View Of the as a brake head balancing device. The subject St ucture Shown in Figure 1.

matter of this invention is divided out of my co- Describing my invention indetail; e brake pending application Serial No. 421,418, filed Dehead. enera y des te .compr ses the spaced ceiving an end of the pin and said bracket affordcember 3, 1941, now Patent #2,355,120, August lugs 4, 4 receiving therebetween the end of an 8, 1944. 10 associated brake lever 6. Each of the lugs 4, 4

An object of the invention herein disclosed is is Provided with an Opening therethrough, d to provide a brake head balancing device of prac- Opening receiving a bushing B and said bushing tical form andsuitable for convenient applicabeing Pro d d h a co lar l0, said collar abuttion to a brake head utilized in a brake arrangeting e ll r II on a bushing l4 positioned in ment forarailway car truck. 16 the adjacent end of an opening in the brake A further object of my invention is to design level tending through the opening in the. a balancing device suitable for utilization in an h1g5 h and the brake leifer 5 1s a Pm off-wh 1 or disc brake arrangement in which affording a pivotal connection for the brake head the brake shoes mounted on the brake heads are 2 as will clearly h'h to those skilled in formed and arranged for engagement with oppothe art, 594d pin compnsmg h g e site sides of an annular brake disc mounted on with h upper brake head Sam plh an associated wheel and axle assembly, said brake extehdmg through bracket secured by the head being so connected to the associated lever bolt and t assembly 22 to brake lever 8 as to permit the head to accommodate varying and underlytng the tower brake head lug angles of application to the braking surfaces of 25 A coil spring 24 1s sleeved over the pm IS in abutment as at 26 with the bracket 20 and in ZEQTZZSZZZEifitiifoiliiiiihifififiriiiiti gggf ggi g gf g gg gg gg 31g igg to the associated lever when released. 3 g J y p er and the bracket by means of a nut 32 threaded My invention comprehends a brake head having spaced lugs receiving therebetween the end of a on the lower end of the pin It Wm be an brake lever and hivotahy secured thereto by press the spring 24, the head "3 of the pin l6 will means of a pin.

. be urged into frictional engagement at 34 with specific object of my lhventmn the the adjacent brake head lug 4 and said brake V1S10n of abracketon the brake lever, said bracket 35 head lug will be urged downwardly toward the overlappmg one of the brake head lugs and brake lever 6 whereby friction will be created bein bu o o nd o a c r gg spring bushings. It will be further apparent that the sleeved over the pm, said pin being prov ed With friction thus created will resist the pivotal moveme n f r c pressing said spri against Said ment of the brake head 2 with respect to the c t, h y the head f e p s frictionallever 6 whereby said brake head will be retained y engaged t e adjacent brake ead 1 s and in normal position upon said lever in released said lug is urged into frictional engagement with siti n,

the adjacent portion of the brake lever. It will A brake shoe 38 is secured at 38, 38 to the be understood t io dev oped as above brake head and is formed and arranged for brakdescribed will retain the brake head in its noring engagement with an annular brake disc fragmal position upon release of the associated brake mentarily indicated at 40. As will be clearly lever while at the same time the brake head will apparent from a consideration of Figure 1, the be permitted pivotal movement with respect to edges of the brake head 2 and the supported brake said lever in order to accommodate movement of shoe 36 are arcuately formed in order that they the associated brake disc during braking applicamay generally conform to the shape of the an- 7 tion of the head thereto. nular brake disc 40. It will be readily understood Still another object of my invention is to deby those skilled in the art that actuating means sign a bracket such as above described which may associated with the lever 6 will cause said lever be readilyapplied and removed from the brake to move the brake head toward the brake disc parent that when the nut 32 is tightened to comtween the collars l0 and I 2 of the associated' 40 whereby the brake shoe 36 will be frictionally engagedwith said disc, said head being afiorded pivotal movement as above described with respect to the brake lever B and frictional resistance to said pivotal movement being afforded by my novel device above described.

In the modification shown the bracket is supported from the lower edge of the brake lever 6, said bracket underlying and being spaced from the lower brake head lug 4. It will be understood that the bracket 20 may be, if desired, secured to the upper edge of the brake lever 6 in a position overlying the upper brake head lug 4, the balancing device being thus reversed from that shown.

It is to be understood that I do not wish to be limited by the exact embodiment of the device shown which is merely by way of illustration and not limitation as various and other forms of the device will, of'course, be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

I claim: 1. In a brake head balancing device, lbrake head and lever members, a pair of spaced rigid means-on one of said members at opposite sides of a portion of the other of said members, a bracket rigidly connected to the last-mentioned member, said bracket being spaced from the firstmentioned member and disposed adjacent one of said spaced rigid means, the clearance between said bracket and the last mentioned rigid means being substantially greater than the clearance between said portion and either of said rigid means, v

a substantial distance from said head and the adjacent lug, a coil spring sleeved over one end of said pin in abutment with said bracket, and means carried by said pin for compressing said coil spring against said bracket.

3. In a balancing device, a brake head member,

' spaced projecting meansthereon, a lever member snugly flttedbetween said projecting means, rigid means pivotally connecting said lever member to said projecting means, spaced abutment means on said lever member and on said rigid means respectively, both of said abutment means being spaced a substantial distance from said head member and from said spaced projecting means, and resilient means compressed between said spaced abutment means, whereby said lever member is frictionally engaged with one or said spaced projecting means. t

4. In a brake head balancing device, a break head with spaced lugs, a lever snugly positioned therebetween, a bracket on said lever spaced from said head and disposed adjacent to but spaced a substantial distance from one of said lugs, a pivot pin having a head abutting the other of said lugs, said pin extending through'said'lugs, said lever, and said bracket, and resilient means on said pin compressed againstthe'surface of said bracket remote from the firstmentioned lug.

5. In a brake-head balancing device, brakev head and levermembers, spaced rigid means on one of said members, rigid means on the other member snugly interposed between said spaced rigid means, a bracket on the last-mentioned member spaced from the first-mentioned member and disposed adjacent to but spaced a substantial distance from one of said spaced rigid means, a pivot pin extending through all of said rigid means and said bracket, said pin having a head abutting the other of said spaced rigid means, and resilient means carried by said pin and compressed against the surface of said bracket remote from the first-mentioned of said spaced rigid means.

6. In a brake head balancing device, brake head and support members, a pair of spaced rigid means on one of said members at opposite sides of a portion of the other of said members, a bracket rigidly connected to the last-mentioned member, said bracket being spaced from the firstmentioned member and disposed adjacent one of said spaced rigid means, the clearance between said bracket and the last-mentioned rigid means being substantially greater than the clearance.

between said portionand either of said rigid means, a pivot member extending through both of said rigid means, said portion and said bracket,

and resilient means on one end of said pivot member compressed against said bracket, the opposite end of said pivot member having abutment means cooperating with the other of said spaced rigid means.

7. In a brake head balancing device, a brake head, spaced lugs thereon, a support member between said lugs, a pivot member extending through said lugs and said support member, and resilient means under compression on one end of said pivot member, said resilient means being formed and arranged to react against said pivot member and against a portion of the support member spaced from said head and said lugs.

8. In abrake head balancing arrangement, a brake head member, a support member, spaced lugs formed on one of said members receivin therebetween a portion of the other member, a pivot member extending through said lugs and said portion, and resilient means under compression on one end of said pivot member and formed and arranged to react thereagainst and against another portion of said other member spaced with one 01' said rigid means, a bracket on said other member entirely disposed externally with respect to the space between said rigid means,

and resilient means under compression and reacting against the bracket and said first-mentioned member --in opposite directions substantially parallel to the axis of the pivot means whereby said portion is urged into said engagement. v 10. In a brake head balancing device, a brake head comprising spaced lugs, a lever disposed-tetween said lugs; a bracket rigidly fixed to said lever, said' bracket being spaced from said head and overlapping. one of said lugs, the clearance between said bracket and said lug being substantially greater than the clearance between said le- 7 verand either of said lugs, a pivot pin extending through said lever, said lugs, and said bracket, said pin affording pivotal interconnection between said lever and said head, and resilient means carried by said pin and compressed against the surface of said bracket remote from the adjacent lug.

11. In a brake head balancing device, a brake head comprising spaced top and bottom lugs, a

, lever disposed between said lugs, a bracket rigidly fixed to said lever, said bracket being spaced from said head and overlapping but spaced from one of said lugs, the clearance between said bracket and said lug being substantially greater than the clearanc between said lever and either of said lugs, a pivot pin having a head abutting the other of said lugs, said pin extending through said 1ever, both of said lugs, and said bracket, and resilient means carried by said pin and compressed against the surface of said bracket remote from the first-mentioned lug.

12. In a brake head balancin arrangement, a brake head, spaced lugs thereon, a lever snugly fitted between said lugs, a pin extending through said lugs and said lever, and resilient means under compression on one end of the pin and formed and arranged to react thereagainst and against a portion of the lever spaced from said head and said lugs.

13. In a, brake head balancing arrangement, a brake head, spaced lugs thereon, a lever snugly interposed between said lugs, a pin extending through said lugs and said lever, and resilient means under compression, carried by one end of the pin, and adapted to react axially thereagainst and against a portion of the lever spaced a substantial distance from said head and said lugs.

14. In a brake head balancin device, a brake head having spaced lugs, a support member extending between said lugs, pivot means extending through said lugs and said member, said member having a portion spaced from said head and disposed at one side of said lugs and said pivot means, resilient means under compression, and means for transmitting reaction of said resilient means axially of said pivot means to said head and to said portion, whereby said support member is frictionally engaged with one of said lugs.

15. In a brake head balancing device, a brake head member, a support member, spaced rigid means onone of said members, rigid means on the other member disposed between said spaced rigid means, pivot means extending through all of said rigid means, resilient means under compression, and means for transmittin reaction of said resilient means to respective members, said transmitting means including a bracket on said other member disposed externally of the space between said spaced rigid means.

, CARL E, TACK. 

